Injecting alternate vaccine types, booster, 3 needles. The Ministry of Health expects another 3-6 months, starting in the general public.
From the case, it was noted that the vaccination against covid-19 alternating type or cross vaccination by the first dose of Sinovac and the second dose, followed by astraZeneca vaccine 3 weeks apart, or at It is called the SA formula. If people have received this formula, will they be able to vaccinate the 3rd dose booster mRNA type or not?
On August 4, at the Ministry of Public Health (MOPH), Dr. Opas Karnkawinpong Director-General of the Department of Disease Control said that there are two parts of concern for this issue: 1. Safety. With each vaccine currently injected, it is also used in emergency situations. but with high security In Thailand, the cumulative injection of nearly 20 million doses has not been found directly from the vaccine, so the vaccine that is used as an alternate formulation of 2 types is safe.
Dr. Opas said that the concern that Is it safe to inject the alternate type? according to the latest information More than 100,000 people have been vaccinated with alternating formulas and there are no problems at all. The results of the autopsy clearly proved that caused by a brain tumor This is not about vaccines, so be sure that vaccines are absolutely safe.
Dr. Opas went on to say that 2.Efficacy of switch vaccines The data from the study is clearer than ever. And will be published as an academic paper soon. The efficacy of the switch-type SA vaccination regimen in the laboratory (lab) was found to produce immunity equivalent to two doses of Astra vaccination 12 weeks apart, so there was no efficacy problem. Immunize the target audience as quickly as possible.
Dr. Opas said that as for the question When will there be a booster needle 3 to the people for the SA formula that the Ministry of Health has just started injecting recently? In which to inject 3 needles, there is an important question that When will the injection be given after the 2nd dose? There is no definitive information yet, but generally it takes 3-6 months or longer. “Now we have to collect data and watch over the three to six months after vaccination. Will the immune system fall or not, and how, and if it needs to be boosted again? There will be additional studies and research that use this approach all over the world. about the booster dose Around the world, it is the same in research that 1. What will the booster be and 2. How far is the distance? So you can be confident that it is safe and effective that lasts long enough,” said Dr. Opas.
Director-General of the Department of Disease Control said that initially, theoretically, if vaccination platforms were different that stimulates the immune system at different levels, it will result in good results, such as the Sinovac vaccine Astra is a level of humoral immunity, while Astra is a level of cellular immunity, which has different advantages, so the two will complement each other, all of which will require a period of academic and follow-up data.
The reporter asked if the SA formula was injected for a while. Is it possible? That there will be a new vaccination program, such as two Pfizer vaccines, Dr. Opas said, probably not that much. Because if the vaccine has already been At least the body is immune There are cells that recognize the immune system. After injecting 1 more dose, it will stimulate the immune system very quickly.
“Booster’s theory It doesn’t start from scratch, so when the vaccine is added, it can stimulate the immune system very quickly because our body cells recognize the virus. But there is a tendency to stimulate the 3rd needle for 2 reasons: 1. Mutated virus. which without the delta species Our world will be much easier to live and 2. We don’t know how there will be more mutations in the future. It is unpredictable, therefore, further academic information must be followed,” said Dr. Opas.
